The property and formation mechanism of unsaturated polyester-layered silicate nanocomposite depending on the fabrication methods

The properties of unsaturated polyester (UP)/montmorillonite (MMT) nanocomposite greatly depend on the preparation procedure because of the chemical reactions and physical interactions involved. To investigate the properties and formation mechanism of UP/MMT nanocomposite, samples were prepared by two different mixing methods. The first method, simultaneous mixing, is similar to the method used for preparing the conventional unsaturated polyester and filler composite. The second method is the sequential mixing, a new approach for preparing unsaturated polyester-layered silicate nanocomposite. In the first step, pre-intercalates of the unsaturated polyester and MMT nanocomposites were prepared. In other words, mixture of the UP and organophillic-treated MMT are prepared in the first step; a styrene monomer was then added to the pre-intercalates of UP/MMT with varying mixing time. The structures of UP/MMT nanocomposite were investigated by X-ray diffraction and transmission electron microscopy. To investigate the formation mechanism of UP/MMT nanocomposite, dynamic mechanical thermal analysis, solution-rheometry and melt-rheometry were performed. The properties and formation processes depending on two methods are compared. These tests enable us to understand the mechanism of UP-silicate nanocomposite formation. Based on this mechanism, we have been able to increase the crosslinking density and the degree of dispersion in UP/MMT nanocomposite. (C) 2000 Published by Elsevier Science Ltd.
Publisher
ELSEVIER SCI LTD
Issue Date
2000-11
Language
ENG
Keywords

GLASS-TRANSITION TEMPERATURE; POLYPROPYLENE-CLAY HYBRIDS; MONTMORILLONITE

Citation

POLYMER, v.41, no.24, pp.8557 - 8563

ISSN
0032-3861
URI
http://hdl.handle.net/10203/5147
Appears in Collection
CBE-Journal Papers(저널논문)
  • Hit : 472
  • Download : 0
  • Cited 0 times in thomson ci
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡClick to seewebofscience_button
⊙ Cited 117 items in WoSClick to see citing articles inrecords_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0